| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.cs; |
| |
| import java.nio.Buffer; |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import java.util.Arrays; |
| import static sun.nio.cs.CharsetMapping.*; |
| |
| public class SingleByte |
| { |
| private static final CoderResult withResult(CoderResult cr, |
| Buffer src, int sp, |
| Buffer dst, int dp) |
| { |
| src.position(sp - src.arrayOffset()); |
| dst.position(dp - dst.arrayOffset()); |
| return cr; |
| } |
| |
| final public static class Decoder extends CharsetDecoder |
| implements ArrayDecoder { |
| private final char[] b2c; |
| |
| public Decoder(Charset cs, char[] b2c) { |
| super(cs, 1.0f, 1.0f); |
| this.b2c = b2c; |
| } |
| |
| private CoderResult decodeArrayLoop(ByteBuffer src, CharBuffer dst) { |
| byte[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| |
| char[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| |
| CoderResult cr = CoderResult.UNDERFLOW; |
| if ((dl - dp) < (sl - sp)) { |
| sl = sp + (dl - dp); |
| cr = CoderResult.OVERFLOW; |
| } |
| |
| while (sp < sl) { |
| char c = decode(sa[sp]); |
| if (c == UNMAPPABLE_DECODING) { |
| return withResult(CoderResult.unmappableForLength(1), |
| src, sp, dst, dp); |
| } |
| da[dp++] = c; |
| sp++; |
| } |
| return withResult(cr, src, sp, dst, dp); |
| } |
| |
| private CoderResult decodeBufferLoop(ByteBuffer src, CharBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| char c = decode(src.get()); |
| if (c == UNMAPPABLE_DECODING) |
| return CoderResult.unmappableForLength(1); |
| if (!dst.hasRemaining()) |
| return CoderResult.OVERFLOW; |
| dst.put(c); |
| mark++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) { |
| if (src.hasArray() && dst.hasArray()) |
| return decodeArrayLoop(src, dst); |
| else |
| return decodeBufferLoop(src, dst); |
| } |
| |
| private final char decode(int b) { |
| return b2c[b + 128]; |
| } |
| |
| private char repl = '\uFFFD'; |
| protected void implReplaceWith(String newReplacement) { |
| repl = newReplacement.charAt(0); |
| } |
| |
| public int decode(byte[] src, int sp, int len, char[] dst) { |
| if (len > dst.length) |
| len = dst.length; |
| int dp = 0; |
| while (dp < len) { |
| dst[dp] = decode(src[sp++]); |
| if (dst[dp] == UNMAPPABLE_DECODING) { |
| dst[dp] = repl; |
| } |
| dp++; |
| } |
| return dp; |
| } |
| } |
| |
| final public static class Encoder extends CharsetEncoder |
| implements ArrayEncoder { |
| private Surrogate.Parser sgp; |
| private final char[] c2b; |
| private final char[] c2bIndex; |
| |
| public Encoder(Charset cs, char[] c2b, char[] c2bIndex) { |
| super(cs, 1.0f, 1.0f); |
| this.c2b = c2b; |
| this.c2bIndex = c2bIndex; |
| } |
| |
| public boolean canEncode(char c) { |
| return encode(c) != UNMAPPABLE_ENCODING; |
| } |
| |
| public boolean isLegalReplacement(byte[] repl) { |
| return ((repl.length == 1 && repl[0] == (byte)'?') || |
| super.isLegalReplacement(repl)); |
| } |
| |
| private CoderResult encodeArrayLoop(CharBuffer src, ByteBuffer dst) { |
| char[] sa = src.array(); |
| int sp = src.arrayOffset() + src.position(); |
| int sl = src.arrayOffset() + src.limit(); |
| |
| byte[] da = dst.array(); |
| int dp = dst.arrayOffset() + dst.position(); |
| int dl = dst.arrayOffset() + dst.limit(); |
| |
| CoderResult cr = CoderResult.UNDERFLOW; |
| if ((dl - dp) < (sl - sp)) { |
| sl = sp + (dl - dp); |
| cr = CoderResult.OVERFLOW; |
| } |
| |
| while (sp < sl) { |
| char c = sa[sp]; |
| int b = encode(c); |
| if (b == UNMAPPABLE_ENCODING) { |
| if (Character.isSurrogate(c)) { |
| if (sgp == null) |
| sgp = new Surrogate.Parser(); |
| if (sgp.parse(c, sa, sp, sl) < 0) |
| return withResult(sgp.error(), src, sp, dst, dp); |
| return withResult(sgp.unmappableResult(), src, sp, dst, dp); |
| } |
| return withResult(CoderResult.unmappableForLength(1), |
| src, sp, dst, dp); |
| } |
| da[dp++] = (byte)b; |
| sp++; |
| } |
| return withResult(cr, src, sp, dst, dp); |
| } |
| |
| private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) { |
| int mark = src.position(); |
| try { |
| while (src.hasRemaining()) { |
| char c = src.get(); |
| int b = encode(c); |
| if (b == UNMAPPABLE_ENCODING) { |
| if (Character.isSurrogate(c)) { |
| if (sgp == null) |
| sgp = new Surrogate.Parser(); |
| if (sgp.parse(c, src) < 0) |
| return sgp.error(); |
| return sgp.unmappableResult(); |
| } |
| return CoderResult.unmappableForLength(1); |
| } |
| if (!dst.hasRemaining()) |
| return CoderResult.OVERFLOW; |
| dst.put((byte)b); |
| mark++; |
| } |
| return CoderResult.UNDERFLOW; |
| } finally { |
| src.position(mark); |
| } |
| } |
| |
| protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) { |
| if (src.hasArray() && dst.hasArray()) |
| return encodeArrayLoop(src, dst); |
| else |
| return encodeBufferLoop(src, dst); |
| } |
| |
| private final int encode(char ch) { |
| char index = c2bIndex[ch >> 8]; |
| if (index == UNMAPPABLE_ENCODING) |
| return UNMAPPABLE_ENCODING; |
| return c2b[index + (ch & 0xff)]; |
| } |
| |
| private byte repl = (byte)'?'; |
| protected void implReplaceWith(byte[] newReplacement) { |
| repl = newReplacement[0]; |
| } |
| |
| public int encode(char[] src, int sp, int len, byte[] dst) { |
| int dp = 0; |
| int sl = sp + Math.min(len, dst.length); |
| while (sp < sl) { |
| char c = src[sp++]; |
| int b = encode(c); |
| if (b != UNMAPPABLE_ENCODING) { |
| dst[dp++] = (byte)b; |
| continue; |
| } |
| if (Character.isHighSurrogate(c) && sp < sl && |
| Character.isLowSurrogate(src[sp])) { |
| if (len > dst.length) { |
| sl++; |
| len--; |
| } |
| sp++; |
| } |
| dst[dp++] = repl; |
| } |
| return dp; |
| } |
| } |
| |
| // init the c2b and c2bIndex tables from b2c. |
| public static void initC2B(char[] b2c, char[] c2bNR, |
| char[] c2b, char[] c2bIndex) { |
| for (int i = 0; i < c2bIndex.length; i++) |
| c2bIndex[i] = UNMAPPABLE_ENCODING; |
| for (int i = 0; i < c2b.length; i++) |
| c2b[i] = UNMAPPABLE_ENCODING; |
| int off = 0; |
| for (int i = 0; i < b2c.length; i++) { |
| char c = b2c[i]; |
| if (c == UNMAPPABLE_DECODING) |
| continue; |
| int index = (c >> 8); |
| if (c2bIndex[index] == UNMAPPABLE_ENCODING) { |
| c2bIndex[index] = (char)off; |
| off += 0x100; |
| } |
| index = c2bIndex[index] + (c & 0xff); |
| c2b[index] = (char)((i>=0x80)?(i-0x80):(i+0x80)); |
| } |
| if (c2bNR != null) { |
| // c-->b nr entries |
| int i = 0; |
| while (i < c2bNR.length) { |
| char b = c2bNR[i++]; |
| char c = c2bNR[i++]; |
| int index = (c >> 8); |
| if (c2bIndex[index] == UNMAPPABLE_ENCODING) { |
| c2bIndex[index] = (char)off; |
| off += 0x100; |
| } |
| index = c2bIndex[index] + (c & 0xff); |
| c2b[index] = b; |
| } |
| } |
| } |
| } |